Previously you could overexpose then "pull" develop certain slide films for slightly lower contrast, but current transparency films aren't very
amenable to this, and the results always tended to muddy the highlights anyway. "Flashing" is another so-so trick which muddies the shadows.
And any decent Ciba print requires significant masking to control the contrast anyway. I'm getting prints the same look as Ciba much more
easily now by using Ektar film and printing it on Fuji Supergloss. Masking is needed only about 30% of the time. With Ciba it's 100% of the
time. Plus Ektar gives you about one stop more range each direction than Provia. You can get even more latitude with more typical color neg
films like Portra 160, but you sacrifice to a considerable extent the clean saturated hues typical of chrome films or now Ektar (Porta is basically engineered as portrait film first, other things second). But obviously with negatives you can't just slap them down on a light box
and instantly recognize what you've got. It takes some experience to judge negatives, or else a contact sheet. Scans can also be used to
evaluate your negs, but affordable low rez scans tend to work very poorly with 35mm color neg film. Printing color neg in your own darkroom
is much easier than printing Cibachrome.